How do you find the nodes you're looking for
I think it would be a great idea for the developers of Blender to show these words in search results even if the word is a part of the node (rather than the node's name itself).  


You should suggest this to the developers, if enough people find it useful it will have a better chance to be implemented,there is a section in blender about small tasks so that new developers can pick a small task and try to code them to be implemented in blender , yours seem like a good task.  


  Does anyone know of a way to find where to find certain functions of a node when it doesn't show up in the search results


There aren't many nodes like that that have those kind of sub menus, if you use blender long enough and with practice you will know their location by heart.  

to ask for a feature to be implemented in blender , see  : Best Place to put Feature Requests?